You can tell because AOC and Bernie endorsed him; trust your political allies on this.
Man, they’re trying to keep up party unity. Speaking out in public with anything except support for a candidate is inevitably read as opposition - the only two choices when talking on the subject are “I am behind [candidate] 100%” or a total Hail Mary “He needs to step down”. And the progressives are in the worst position to make such a demand - if they did, they would inevitably be accused of not being ‘team players’ and ostracized within the party, even if Biden does step down.
Man, they’re trying to keep up party unity. Speaking out in public with anything except support for a candidate is inevitably read as opposition - the only two choices when talking on the subject are “I am behind [candidate] 100%” or a total Hail Mary “He needs to step down”. And the progressives are in the worst position to make such a demand - if they did, they would inevitably be accused of not being ‘team players’ and ostracized within the party, even if Biden does step down.